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add old serializable mapping (#15906)

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Harrison Chase 2024-01-11 13:03:12 -08:00 committed by GitHub
parent 623f87c888
commit 80d41a8da3
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2 changed files with 45 additions and 3 deletions
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7
libs/core/langchain_core/load/load.py
View File

@ -5,6 +5,7 @@ from typing import Any, Dict, List, Optional
from langchain_core._api import beta from langchain_core._api import beta
from langchain_core.load.mapping import ( from langchain_core.load.mapping import (
OG_SERIALIZABLE_MAPPING,
OLD_PROMPT_TEMPLATE_FORMATS, OLD_PROMPT_TEMPLATE_FORMATS,
SERIALIZABLE_MAPPING, SERIALIZABLE_MAPPING,
) )
@ -12,7 +13,11 @@ from langchain_core.load.serializable import Serializable
DEFAULT_NAMESPACES = ["langchain", "langchain_core", "langchain_community"] DEFAULT_NAMESPACES = ["langchain", "langchain_core", "langchain_community"]
ALL_SERIALIZABLE_MAPPINGS = {**SERIALIZABLE_MAPPING, **OLD_PROMPT_TEMPLATE_FORMATS} ALL_SERIALIZABLE_MAPPINGS = {
**SERIALIZABLE_MAPPING,
**OLD_PROMPT_TEMPLATE_FORMATS,
**OG_SERIALIZABLE_MAPPING,
}
class Reviver: class Reviver:

41
libs/core/langchain_core/load/mapping.py
View File

@ -1,6 +1,8 @@
from typing import Dict, Tuple
# First value is the value that it is serialized as # First value is the value that it is serialized as
# Second value is the path to load it from # Second value is the path to load it from
SERIALIZABLE_MAPPING = { SERIALIZABLE_MAPPING: Dict[Tuple[str, ...], Tuple[str, ...]] = {
("langchain", "schema", "messages", "AIMessage"): ( ("langchain", "schema", "messages", "AIMessage"): (
"langchain_core", "langchain_core",
"messages", "messages",
@ -477,9 +479,44 @@ SERIALIZABLE_MAPPING = {
), ),
} }
# Needed for backwards compatibility for old versions of LangChain where things
# Were in different place
OG_SERIALIZABLE_MAPPING: Dict[Tuple[str, ...], Tuple[str, ...]] = {
("langchain", "schema", "AIMessage"): (
"langchain_core",
"messages",
"ai",
"AIMessage",
),
("langchain", "schema", "ChatMessage"): (
"langchain_core",
"messages",
"chat",
"ChatMessage",
),
("langchain", "schema", "FunctionMessage"): (
"langchain_core",
"messages",
"function",
"FunctionMessage",
),
("langchain", "schema", "HumanMessage"): (
"langchain_core",
"messages",
"human",
"HumanMessage",
),
("langchain", "schema", "SystemMessage"): (
"langchain_core",
"messages",
"system",
"SystemMessage",
),
}
# Needed for backwards compatibility for a few versions where we serialized # Needed for backwards compatibility for a few versions where we serialized
# with langchain_core # with langchain_core
OLD_PROMPT_TEMPLATE_FORMATS = { OLD_PROMPT_TEMPLATE_FORMATS: Dict[Tuple[str, ...], Tuple[str, ...]] = {
( (
"langchain_core", "langchain_core",
"prompts", "prompts",